Actual Yield Calculator

Work out actual yield instantly with clear inputs, formula shown and shareable results.

About Actual Yield Calculator

Percent yield is the actual yield divided by the theoretical yield, so knowing any two of the three gives the third. Here the theoretical maximum is scaled by the yield achieved: a reaction with a 25 g ceiling running at 78% delivers 19.5 g of product and leaves 5.5 g unaccounted for.

Formulas

Actual yield

actual = theoretical x percent yield / 100

Loss

loss = theoretical - actual

Worked example

With the default values below, Actual Yield Calculator returns Actual Yield of 19.500. Change any input above and every figure here is recalculated in your browser.

Inputs used

Theoretical yieldminimum 0 g: 25 g
Percent yield achievedaccepts 0–100 %: 78 %

Results

Actual Yield: 19.500 g
Mass Not Recovered: 5.500 g
Loss: 22.00%
Recovery As A Fraction: 0.7800

Step by step

1Values used
2Actual yield
3Loss
4Actual Yield= 19.500 g
5Mass Not Recovered= 5.500 g
6Loss= 22.00
7Recovery As A Fraction= 0.7800

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Where does the missing mass go?

Incomplete reaction, competing side reactions, material left on glassware and losses during filtration or recrystallisation all reduce recovery.

Can percent yield exceed 100?

Only as an error signal - usually residual solvent or an impure product. Genuine yields cannot beat the stoichiometric ceiling.